Contents in this article
- Service mode ( Factory adjustment mode )
- Causes of Standby led flashing
- Subcontrast adjustment
- White balance adjustment
- Voltages at the different part of circuit board
- Service mode ( Factory adjustment mode )
- Causes of Standby led flashing
- Subcontrast adjustment
- White balance adjustment
- Voltages at the different part of circuit board
PANASONIC TX-32LX70P - TX-26LX70F
SERVICE MODE LED BLINKING CODE AND VOLTAGE ADJUSTMENTS
Service Mode Function
MPU controls the functions switching for each IICs through IIC bus in this chassis. The following setting and adjustment can be adjusted by remote control in Service Menu.
How to enter to service mode
While pressing (-/v) button on the TV unit, press on the remote control for 3 times within 2 seconds.
Note:
To exit from Service mode, press the exit button on remote control.
MPU controls the functions switching for each IICs through IIC bus in this chassis. The following setting and adjustment can be adjusted by remote control in Service Menu.
How to enter to service mode
While pressing (-/v) button on the TV unit, press on the remote control for 3 times within 2 seconds.
Note:
To exit from Service mode, press the exit button on remote control.
Key Command
# Press the 3/4 button to change the adjustment values or function.
# Press the 1/2 button to step up/down through the functions and adjustments
# Press the numerical button VOLUME (+/-) to change of each option item.
# Press the OK button after each adjustment has been made to store the required values.
# Press the 3/4 button to change the adjustment values or function.
# Press the 1/2 button to step up/down through the functions and adjustments
# Press the numerical button VOLUME (+/-) to change of each option item.
# Press the OK button after each adjustment has been made to store the required values.
Subcontrast adjustment
1. Receive PAL colour bar (100% white) RF signal.
2. Enter “Contrast” adj. In SERVICE mode.
3. Start adjusting by using Yellow Key.
4. If the adjustment finished normally, the letter of Contrast will change from red to black.
White Balance adjustment
1. Procedure basically performs checking using the production software and make automatic adjustment using external computer.
2. It adjusts in the mode of: Colour balance Normal Viewing Mode Dynamic
1. Receive PAL colour bar (100% white) RF signal.
2. Enter “Contrast” adj. In SERVICE mode.
3. Start adjusting by using Yellow Key.
4. If the adjustment finished normally, the letter of Contrast will change from red to black.
White Balance adjustment
1. Procedure basically performs checking using the production software and make automatic adjustment using external computer.
2. It adjusts in the mode of: Colour balance Normal Viewing Mode Dynamic
VOLTAGE ADJUSTMENTS
AP board
Description
|
Test
point
|
Position
|
Normal
mode
|
Stand
by mode
|
Sound_Vcc
|
TP7302
|
AP3,
pin 2,3
|
15V +/-
0,8V
|
Max 5V
|
DTV_9V
|
TP7502
|
AP3,
pin 17,18
|
9,1V
+/- 0,45V
|
Max 3V
|
Sub_5V
|
TP7402
|
AP3,
pin 21,22
|
5,1V
+/- 0,25V
|
Max 2V
|
Main_9V
|
AP3,
pin 23
|
9,1V
+/- 0,45V
|
Max 3V
|
|
LCD_3.3V
|
TP7602
|
AP4,
pin 16,17
|
3,3V
+/- 0,16V
|
Max 2V
|
STB_5V
|
TP7103
|
AP4,
pin 3
|
5,1V
+/- 0,25V
|
5,1V
+/- 0,25V
|
Panel
12V
|
TP7702
|
AP4,
pin 11,12
|
12,2V
+/- 0,6V
|
Max 4V
|
P board
Description
|
Test
point
|
Position
|
Normal
mode
|
Stand
by mode
|
5Vs
|
TP823
|
P8, pin 1
|
5,1V +/- 0,25V
|
5,1V +/- 0,25V
|
24V
|
TP825
|
P5, pin 1-3
|
24V +/- 2V
|
Max 4V
|
DG board
Description
|
Test
point
|
Normal
mode
|
Sub1,2V
|
TP5601
|
1,17V -
1,32V
|
Sub1,8V
|
TP5602
|
1,7V -
1,9V
|
Sub3,3V
|
TP5600
|
3,14V -
3,46V
|
MHQ1,2V
|
TP4209
|
1,1V -
1,3V
|
Power LED blinking
When abnormality has occurred the unit, the protection
circuit operates and reset to the stand by mode. At this time, the defective block can be identified by number of blinking of the Power LED on the
front panel of the unit.
Blinking times
|
Contents
|
Check point
|
1
|
INVERTER_SOS
|
DG
BOARD
LCD PANEL |
2
|
FAN_SOS
|
H BOARD
DG BOARD |
3
|
BT_30V,SOUND
15V
PANEL 12V, HQ_ 3.3V |
H BOARD
AP BOARD,DG BOARD |
4
|
DTV_9V
|
AP
BOARD
H BOARD, DG BOARD |
5
|
MAIN_9V
|
AP
BOARD
H BOARD, DG BOARD |
6
|
SUB_5V
|
AP
BOARD
H BOARD, DG BOARD |
7
|
MAIN_5V
|
DG
BOARD
|
8
|
MAIN_3.3V
|
DG
BOARD
|
9
|
SOUND_SOS
|
H BOARD
DG BOARD |
10
|
HQ1L_SOS
|
DG BOARD
|
